这里采用bash进行shell编程。因为bash是免费的，并且方便使用。bash -  bourne again shell 文件命名为 myshell.sh 执行文件前，先获得权限： chomod 777 myshell.sh 1.显示文件内容 #!/bin/bash cat myshell.sh 执行命令： ./myshell.sh 显示结果：

1 if #!/bin/bash echo "Please chose your favourite fruit:"; select fruit in "apple" "orange" "banana" "none"; do break; done; if [ $fruit == "apple" ] then echo "you like apple!" elif [ $fru

<!-- @page {margin:2cm} h3 {margin-top:0.46cm; margin-bottom:0.46cm; line-height:173%; page-break-inside:avoid} h3.western {font-family:"Times New Roman",serif; font-size:16pt} h3.cj

先看一个例子： #!/bin/bash area2=(zero one two three four) echo "Origin is :" echo ${area2[0]} ${area2[1]} ${area2[2]} ${area2[3]} ${area2[4]} area2[1]=1 area2[4]=4 echo "After is :" echo ${area2[0]} $

1 for loops <!-- @page {margin:2cm} p {margin-bottom:0.21cm} --> 结构： for arg in [list] do command(s)... done #!/bin/bash sum=0 for INT in 1 2 3 4 5 do sum=`expr $sum + $INT`

一个例子： #!/bin/bash One() { echo "You like $num" } Two() { echo "You like $num" } Three() { echo "You like $num" } echo "the usage of function : " select num in "one" "two" "three" do

ex 简单例子： str=("h_ee" "h__i" "h_ed0llo") for s in ${str[@]}; do    echo "$s" done